Year	Percent
1950	6.66248
1955	6.59357
1960	7.36258
1965	8.75575
1970	8.57986
1975	8.77469
1980	8.72975
1985	8.11105
1990	7.9668
1995	6.84504
2000	6.68951
2005	6.66144
2010	6.4591
2015	6.04281
2020	5.82146
2025	6.15993
2030	6.18772
2035	6.24583
2040	6.0125
2045	5.77671
2050	5.61057
2055	5.58088
2060	5.6179
2065	5.62793
2070	5.55632
2075	5.4391
2080	5.32672
2085	5.25204
2090	5.21826
2095	5.18573
2100	5.13427